Spectroscopy of the E state of iodine monofluoride and rotational energy transfer of the B state in collisions with He, using two-photon sequential absorption spectroscopy

<p>“The Two Photon Sequential Absorption (TPSA) technique has been used to investigate a state of 0⁺ symmetry of IF (iodine monofluoride) which has T_e= 41292 cm^-1, ω_e = 248.8 cm^-1, and B_e = .1292 cm^-1. This state has been designated the E state and dissociates to I⁺(³P₂) and F^-(¹S₀) ionic partners.</p> <p>The TPSA technique was also used to study collisions between IF molecules in specific rotational levels of the B state and He atoms. The total depopulation rate of an individual rotational level for v_B = 6 of IF(B state) in He was found to be 4x10^-10 cm³ molecule^-1 s^-1.</p> <p>In both experiments, individual rotational-vibrational levels in the B state were initially populated with pulsed dye laser radiation. A second pulsed dye laser was scanned through its dye profile, inducing transitions from the B state to the E state. In the initial investigation of the E state, the total cell pressure was maintained at 1 Torr and no collisionally populated B state levels were encountered. After the E state characteristics were determined, the cell pressure was increased to between 3 Torr and 9 Torr, and collisionally populated B state levels were observed”—Abstract, page ii.</p>

Name thesis:degree_name

Ph. D. in Physics

Grantor

University of Missouri--Rolla

Year dc:date.available

2016

Author dc:creator

• Clark, Brian Keith

• Physics

Repository record dc:identifier

https://scholarsmine.mst.edu/doctoral_dissertations/610

OAI identifier oai:identifier

oai:scholarsmine.mst.edu:doctoral_dissertations-1612